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Polyethylene resin composition for bottle cap of mineral water beverage bottle and preparation method thereof

A technology for polyethylene resin and beverage bottles, applied in the field of polyolefin compositions, can solve the problems of affecting the hygienic performance of products, complicated and cumbersome preparation process, and inappropriateness, etc., so as to suppress the generation of product odor, improve compatibility, and overcome screw extrusion. non-slip effect

Active Publication Date: 2018-10-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN103627061 The preparation process of A is complex and cumbersome, and there are many kinds of additives, which affect the hygienic performance of the product. It is not suitable for the production of bottle caps as food-grade products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] High density polyethylene (melt flow rate is 3.0g / 10min, density is 0.958g / cm 3 ) mixed with antioxidant, adsorbent and lubricant, wherein the antioxidant is β-(3,5 di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the addition amount is 1200ppm; the adsorbent is Silica, the addition amount is 200ppm, the particle size is 80μm, the adsorbent is surface treated by ball milling, the ball milling speed is 5 rpm, and the treatment time is 10 minutes; the lubricant is zinc stearate, the addition amount is 1000ppm (The above are based on each gram of high-density polyethylene). The above composition was added to a kneader, the cylinder temperature was 240° C., and the screw speed was 40 r / min. After being extruded and granulated by a mixer, it is made into a bottle cap product, and the product properties are shown in Table 1.

Embodiment 2

[0065] High-density polyethylene (melt flow rate is 4.0g / 10min, density is 0.951g / cm 3 ) mixed with antioxidant, adsorbent and lubricant, wherein the antioxidant is three (1,4-di-tert-butylphenyl) phosphite, and the addition is 2000ppm; the adsorbent is activated carbon, and the addition is 800ppm, The particle size is 20 μm, wherein the adsorbent is surface-treated through ball milling, the ball milling speed is preferably 20 revolutions per minute, and the treatment time is preferably 20 minutes; the lubricant is calcium stearate, and the addition amount is 900ppm (the above are all in height per gram Density polyethylene as the benchmark). The above composition was added to a kneader, the cylinder temperature was 230° C., and the screw speed was 45 r / min. After being extruded and granulated by a mixer, it is made into a bottle cap product, and the product properties are shown in Table 1.

Embodiment 3

[0067] High-density polyethylene (melt flow rate is 1.0g / 10min, density is 0.953g / cm 3 ) mixed with antioxidant, adsorbent and lubricant, wherein the antioxidant is three (1,4-di-tert-butylphenyl) phosphite, and the addition is 2000ppm; the adsorbent is activated carbon, and the addition is 500ppm, The particle size is 25 μm, and the adsorbent is surface-treated by ball milling. The ball milling speed is 1 rpm, and the treatment time is 30 minutes; ethylene as the basis). The above composition was added to a kneader, the cylinder temperature was 220° C., and the screw speed was 55 r / min. After being extruded and granulated by a mixer, it is made into a bottle cap product, and the product properties are shown in Table 1.

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PUM

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Abstract

The invention relates to a preparation method of a polyethylene resin composition for mineral water and beverage bottle caps. The polyethylene resin composition is formed by mixing high-density polyethylene (HDPE) and an additive. The polyethylene resin composition is characterized in that the additive is formed by compounding 100-3,000 ppm of antioxygen, 100-1,000 ppm of adsorbent and 100-2,000 ppm of lubricant (with per gram of the high-density polyethylene serving as the reference), wherein the adsorbent is subjected to surface processing in a ball-milling mode. By the adoption of the bottle caps prepared from the composition, the smell of the beverage bottle cap material can be reduced, bottle cap surface friction force is increased, and the bottle caps can be opened more easily.

Description

technical field [0001] The invention relates to a polyolefin composition, in particular to a polyethylene resin composition for bottle caps of mineral water beverage bottles. Background technique [0002] With the improvement of people's living standards, people pay special attention to food safety issues. Some of the food safety problems are caused by food packaging that does not meet hygienic standards. For mineral water beverage bottle packaging, although the weight of a bottle cap is only 1.5-3g, but it is in direct contact with drinking water, so the hygienic performance of the bottle cap has also been highly concerned by pure water manufacturers. [0003] At present, the domestic demand for special polyethylene bottle cap materials that meet food hygiene requirements is 400,000 to 500,000 tons per year, and maintains an annual growth rate of more than 8%. The domestic demand for polyethylene bottle cap special materials is mainly distributed in East China, Typical use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K9/00C08K3/36C08K3/04C08K7/26C08K5/098
Inventor 高宇新张瑞任鹤王文燕王斯晗姜进宪宋磊李冬霞张占宾付强曹学丰孙彬彬方宏韦德帅王华闫功臣马丽田炳权梁利伟李波
Owner PETROCHINA CO LTD
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